diff --git a/src/rtapi/rtapi_atomic.h b/src/rtapi/rtapi_atomic.h
index 2313556330a..9c89f2d1565 100644
--- a/src/rtapi/rtapi_atomic.h
+++ b/src/rtapi/rtapi_atomic.h
@@ -18,7 +18,7 @@
 
 #if defined(__GNUC__) && ((__GNUC__ << 8) | __GNUC_MINOR__) >= 0x409
 #define RTAPI_USE_STDATOMIC
-#elif defined(__STDC_VERSION__) && __STDC_VERSION > 201112L
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
 #define RTAPI_USE_STDATOMIC
 #endif